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RDMA/nldev: Prevent underflow in nldev_stat_set_counter_dynamic_doit()

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This code checks "index" for an upper bound but it does not check for
negatives.  Change the type to unsigned to prevent underflows.

Fixes: 3c3c1f1416 ("RDMA/nldev: Allow optional-counter status configuration through RDMA netlink")
Link: https://lore.kernel.org/r/20220316083948.GC30941@kili
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Dan Carpenter 2022-03-16 11:39:48 +03:00 committed by Jason Gunthorpe
parent 2e11a5e459
commit 87e0eacb17
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/core/nldev.c
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@ -1951,9 +1951,10 @@ static int nldev_stat_set_counter_dynamic_doit(struct nlattr *tb[],
u32 port)
{
struct rdma_hw_stats *stats;
int rem, i, index, ret = 0;
struct nlattr *entry_attr;
unsigned long *target;
int rem, i, ret = 0;
u32 index;
stats = ib_get_hw_stats_port(device, port);
if (!stats)